var verify_item_exist = JSON.parse('{"CODE":0, "ACTION":"","LEVEL":"T1", "MSG":"","DATA":"","SCRIPTNAME":"verify_item_exist"}');
//商品号不存在

if ((typeof item_store_json == 'undefined' || isNull(item_store_json)) &&
    (typeof item_dc_json == 'undefined' || isNull(item_dc_json))) {
    verify_item_exist.CODE = 2;
    verify_item_exist.ACTION = 'risk';
    verify_item_exist.MSG = '商品号不存在或不在此门店区域售卖';
}


JSON.stringify(verify_item_exist);